Fluorescence and colorimetric‐based sensing of Hg2+ and Cu2+ using rhodamine derivative. (19th November 2022)

• Record Type: Journal Article
• Authors: Hu, Jian‐Peng; Lin, Qi; Yao, Hong; Zhang, You‐Ming; Wei, Tai‐Bao
• Is Part Of: Applied organometallic chemistry. Volume 37:Number 2(2023)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-11-19
• Subjects: copper ion -- dual‐chemosensor -- mercury ion -- rhodamine -- ring‐opened; Organometallic chemistry -- Periodicals; Organometallic compounds -- Periodicals; 547.05
• DOI: 10.1002/aoc.6938
• Languages: English
• ISSNs: 0268-2605

Abstract

Abstract : Effective and simultaneous detection of multimetal ions has been achieved by a colorimetric and fluorometric sensor (RA ), which was fabricated between rhodamine hydrazide and 9‐anthraldehyde through a simple Schiff base reaction. Sensor RA provided an effective platform for reliable detection of Hg 2+ with a detection limit as low as 9.978 × 10 −9 and displayed fabulous sensitivity for Cu 2+ with a low limit of detection (LOD) of 4.81 × 10 −8 M of detection limit toward Cu 2+ . Among them, the detection limit for heavy metal mercury ions has reached the ultrasensitive level. The sensing mechanism between RA and metal ions was further confirmed by 1 H NMR and IR titration experiments and high‐resolution mass spectrometry and discussed from a theoretic level based on crystal structures and density functional theory (DFT) calculations. The switch in turn‐on signaling was attributed to the spiro‐lactam and ring‐opened form of RA and was accompanied by significant changes in ultraviolet spectroscopy and fluorescent spectrum. Abstract : We present a novel sensor (RA) between rhodamine hydrazide and 9‐anthraldehyde. According to the switch in turn‐on signaling between spirolactam and ring‐opened form of RA and accompanied by significant changes in ultraviolet spectroscopy and fluorescent spectrum, sensor RA displayed fabulous sensitivity for Cu 2+ and Hg 2+ with a strong ability of anti‐interference performance. Additionally, the preparation of test strips membrane material provides an opportunity to develop low‐cost test panels.